Recently, some people have asked how many pumps need to be used for micro-sprinkling in 50 mu of land.
For the choice of irrigation water pump, the type of water pump should be selected according to the water source condition. Secondly, the head and flow rate of the water pump are considered according to the irrigation area. The above conditions are determined. Micro-spraying and drip irrigation can achieve the desired effect. Here we will make a detailed analysis of this:
First, the type of pump
There are different options for different areas of agricultural irrigation pumps. There are three main types of agricultural pumps available: mixed flow pumps, centrifugal pumps, and submersible pumps. The flow and head of the mixed flow pump are between the centrifugal pump and the axial flow pump. The utility model has the advantages of small body shape, light weight, high efficiency, high efficiency and wide area, simple structure, convenient use and easy maintenance. The conveying medium is clear water or similar to clean water, and is suitable for irrigation and drainage of farmland in areas rich in surface water sources in the south. The centrifugal pump works by rotating the impeller to cause the water to undergo centrifugal motion. There are many models to choose from, and the range of flow and lift can be selected. It is the most widely used pump in agriculture. In the plain area, a lower centrifugal pump can be selected, a hill area can choose a moderate lift, and a high-altitude multi-stage centrifugal pump can be used in a high altitude area. Users should purchase according to local conditions, water source and water lifting height. The submersible pump is suitable for pumping water from deep water wells. It is mainly used for irrigation of farmland in the plain area where surface water is lacking in North China and other areas and irrigation in plateau mountains.
Second, the pump head
The so-called head refers to the required pressure, not a single lifting height. It is especially important to choose a pump. The pump lift is about 1.15 to 1.20 times the lift height. If the vertical height of a water source to the water is 20 meters, the required lift is about 23 to 24 meters. When selecting the pump, the head on the pump nameplate should be close to the required head. In this case, the pump is the most efficient and the use is more economical. However, it is not necessarily required to be absolutely equal. As long as the general deviation does not exceed 20%, the pump can work in a more energy-saving situation.
Choosing a pump with a head on the nameplate that is much smaller than the required head will often not satisfy the user's wishes. Even if the water can be pumped, the amount of water will be pitifully small, and it will even become a useless pump. . Is it better to buy a pump with the highest lift? Actually it is not. If the pump with high lift is used for low lift, the flow will be too large, causing the motor to be overloaded. If the motor temperature rises for a long time, the winding insulation will gradually age and even burn the motor.